Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8038800 | Method and device for cleaning the door of a coke oven | Frank Rossa, Friedrich Huhn, Jürgen George, Ralf Hoven, Detlef Mattern +3 more | 2011-10-18 |
| 7176341 | Method and devices for producing naphthalene from coke produced from coke oven crude gas | Frank Rossa, Horst Schroder | 2007-02-13 |
| 7166197 | Coke oven door with wraparound gas channel and membrane | Klaus Dieter Ruthemann, Jürgen George, Franz Liesewitz, Horst Schroder, Friedrich-Wilhelm Cyris | 2007-01-23 |
| 7067043 | Coke oven door with gas channel | Franz Liesewitz, Friedrich-Wilhelm Cyris, Frank Rossa | 2006-06-27 |
| 6929719 | Leveller bar for coking ovens | Jürgen George, Klaus Dieter Ruthemann | 2005-08-16 |
| 6918999 | Device and method for sealing levelling door aperture of a coke oven chamber | Friedrich-Wilhelm Cyris, Friedrich Huhn, Franz Liesewitz | 2005-07-19 |
| 5609731 | Process for gas pressure regulation in the retort of a coke oven | Werner Eisenhut, Friedrich Huhn, Hans J. Hammermann | 1997-03-11 |
| 4412684 | Liquid seal for closing an opening of a reaction vessel | — | 1983-11-01 |
| 4254338 | Determination of temperature distributions on awkwardly located or low-access surfaces | Otto Abel, Joachim Hoppe, Werner Eisenhut, Bhubaneswar Sarangi, Gunter Serwatzky | 1981-03-03 |